20418921

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{317}}^1\times {\mathrm{421}}^1$

素因数の和:761

約数の個数: 24

約数和(自身を含む): 31401864

約数和(自身を除く): 10982943

約数列:

[1, 3, 9, 17, 51, 153, 317, 421, 951, 1263, 2853, 3789, 5389, 7157, 16167, 21471, 48501, 64413, 133457, 400371, 1201113, 2268769, 6806307, 20418921]

約数ペア:

[(1, 20418921), (3, 6806307), (9, 2268769), (17, 1201113), (51, 400371), (153, 133457), (317, 64413), (421, 48501), (951, 21471), (1263, 16167), (2853, 7157), (3789, 5389)]